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/* decrypt-verify.c - Decrypt and verify function.
* Copyright (C) 2000 Werner Koch (dd9jn)
* Copyright (C) 2001, 2002, 2003, 2004 g10 Code GmbH
*
* This file is part of GPGME.
*
* GPGME is free software; you can redistribute it and/or modify it
* under the terms of the GNU Lesser General Public License as
* published by the Free Software Foundation; either version 2.1 of
* the License, or (at your option) any later version.
*
* GPGME is distributed in the hope that it will be useful, but
* WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
* Lesser General Public License for more details.
*
* You should have received a copy of the GNU Lesser General Public
* License along with this program; if not, see <https://gnu.org/licenses/>.
* SPDX-License-Identifier: LGPL-2.1-or-later
*/
#if HAVE_CONFIG_H
#include <config.h>
#endif
#include <assert.h>
#include "debug.h"
#include "gpgme.h"
#include "ops.h"
static gpgme_error_t
decrypt_verify_status_handler (void *priv, gpgme_status_code_t code,
char *args)
{
gpgme_error_t err;
gpgme_error_t err2;
err = _gpgme_progress_status_handler (priv, code, args);
if (!err)
err = _gpgme_decrypt_status_handler (priv, code, args);
/* Allow finalization of signature verification even if previous handler
* returned NO DATA error which just means that the data wasn't encrypted. */
if (!err
|| (code == GPGME_STATUS_EOF && gpg_err_code (err) == GPG_ERR_NO_DATA))
err2 = _gpgme_verify_status_handler (priv, code, args);
return err ? err : err2;
}
static gpgme_error_t
decrypt_verify_start (gpgme_ctx_t ctx, int synchronous,
gpgme_decrypt_flags_t flags,
gpgme_data_t cipher, gpgme_data_t plain)
{
gpgme_error_t err;
assert ((flags & GPGME_DECRYPT_VERIFY));
err = _gpgme_op_reset (ctx, synchronous);
if (err)
return err;
err = _gpgme_op_decrypt_init_result (ctx, plain, flags);
if (err)
return err;
err = _gpgme_op_verify_init_result (ctx);
if (err)
return err;
if (!cipher)
return gpg_error (GPG_ERR_NO_DATA);
if (!plain)
return gpg_error (GPG_ERR_INV_VALUE);
if (ctx->passphrase_cb)
{
err = _gpgme_engine_set_command_handler
(ctx->engine, _gpgme_passphrase_command_handler, ctx);
if (err)
return err;
}
_gpgme_engine_set_status_handler (ctx->engine,
decrypt_verify_status_handler, ctx);
return _gpgme_engine_op_decrypt (ctx->engine,
flags,
cipher, plain,
ctx->export_session_keys,
ctx->override_session_key,
ctx->auto_key_retrieve);
}
/* Decrypt ciphertext CIPHER and make a signature verification within
CTX and store the resulting plaintext in PLAIN. */
gpgme_error_t
gpgme_op_decrypt_verify_start (gpgme_ctx_t ctx, gpgme_data_t cipher,
gpgme_data_t plain)
{
gpgme_error_t err;
TRACE_BEG (DEBUG_CTX, "gpgme_op_decrypt_verify_start", ctx,
"cipher=%p, plain=%p", cipher, plain);
if (!ctx)
return TRACE_ERR (gpg_error (GPG_ERR_INV_VALUE));
err = decrypt_verify_start (ctx, 0, GPGME_DECRYPT_VERIFY, cipher, plain);
return TRACE_ERR (err);
}
/* Decrypt ciphertext CIPHER and make a signature verification within
CTX and store the resulting plaintext in PLAIN. */
gpgme_error_t
gpgme_op_decrypt_verify (gpgme_ctx_t ctx, gpgme_data_t cipher,
gpgme_data_t plain)
{
gpgme_error_t err;
TRACE_BEG (DEBUG_CTX, "gpgme_op_decrypt_verify", ctx,
"cipher=%p, plain=%p", cipher, plain);
if (!ctx)
return TRACE_ERR (gpg_error (GPG_ERR_INV_VALUE));
err = decrypt_verify_start (ctx, 1, GPGME_DECRYPT_VERIFY, cipher, plain);
if (!err)
err = _gpgme_wait_one (ctx);
ctx->ignore_mdc_error = 0; /* Always reset. */
return TRACE_ERR (err);
}
/* Decrypt ciphertext CIPHER within CTX and store the resulting
plaintext in PLAIN. */
gpgme_error_t
gpgme_op_decrypt_ext_start (gpgme_ctx_t ctx,
gpgme_decrypt_flags_t flags,
gpgme_data_t cipher,
gpgme_data_t plain)
{
gpgme_error_t err;
TRACE_BEG (DEBUG_CTX, "gpgme_op_decrypt_ext_start", ctx,
"cipher=%p, plain=%p", cipher, plain);
if (!ctx)
return TRACE_ERR (gpg_error (GPG_ERR_INV_VALUE));
if ((flags & GPGME_DECRYPT_VERIFY))
err = decrypt_verify_start (ctx, 0, flags, cipher, plain);
else
err = _gpgme_decrypt_start (ctx, 0, flags, cipher, plain);
return TRACE_ERR (err);
}
/* Decrypt ciphertext CIPHER within CTX and store the resulting
plaintext in PLAIN. */
gpgme_error_t
gpgme_op_decrypt_ext (gpgme_ctx_t ctx,
gpgme_decrypt_flags_t flags,
gpgme_data_t cipher,
gpgme_data_t plain)
{
gpgme_error_t err;
TRACE_BEG (DEBUG_CTX, "gpgme_op_decrypt_ext", ctx,
"cipher=%p, plain=%p", cipher, plain);
if (!ctx)
return TRACE_ERR (gpg_error (GPG_ERR_INV_VALUE));
if ((flags & GPGME_DECRYPT_VERIFY))
err = decrypt_verify_start (ctx, 1, flags, cipher, plain);
else
err = _gpgme_decrypt_start (ctx, 1, flags, cipher, plain);
if (!err)
err = _gpgme_wait_one (ctx);
ctx->ignore_mdc_error = 0; /* Always reset. */
return TRACE_ERR (err);
}
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